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<title>Berkeley DB Reference Guide: Release 4.0: lock_XXX</title>
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<td><b><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></b></td>
<td align=right><a href="../upgrade.4.0/deadlock.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.4.0/log.html"><img src="../../images/next.gif" alt="Next"></a>
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<p align=center><b>Release 4.0: lock_XXX</b></p>
<p>The C API for the Berkeley DB Locking subsystem was reworked in the 4.0
release as follows:</p>
<table border=1 align=center>
<tr><th>Historic functional interface</th><th>Berkeley DB 4.X method</th></tr>
<tr><td>lock_detect</td><td><a href="../../api_c/lock_detect.html">DB_ENV-&gt;lock_detect</a></td></tr>
<tr><td>lock_get</td><td><a href="../../api_c/lock_get.html">DB_ENV-&gt;lock_get</a></td></tr>
<tr><td>lock_id</td><td><a href="../../api_c/lock_id.html">DB_ENV-&gt;lock_id</a></td></tr>
<tr><td>lock_put</td><td><a href="../../api_c/lock_put.html">DB_ENV-&gt;lock_put</a></td></tr>
<tr><td>lock_stat</td><td><a href="../../api_c/lock_stat.html">DB_ENV-&gt;lock_stat</a></td></tr>
<tr><td>lock_vec</td><td><a href="../../api_c/lock_vec.html">DB_ENV-&gt;lock_vec</a></td></tr>
</table>
<p>Applications calling any of these functions should update their calls
to use the enclosing <a href="../../api_c/env_class.html">DB_ENV</a> handle's method (easily done as the
first argument to the existing call is the correct handle to use).</p>
<p>In addition, the <a href="../../api_c/lock_stat.html">DB_ENV-&gt;lock_stat</a> call has been changed in the 4.0
release to take a flags argument.  To leave their historic behavior
unchanged, applications should add a final argument of 0 to any calls
made to <a href="../../api_c/lock_stat.html">DB_ENV-&gt;lock_stat</a>.</p>
<p>The C++ and Java APIs for the DbLock::put (DbLock.put) method was
reworked in the 4.0 release to make the lock put interface a method of
the <a href="../../api_c/env_class.html">DB_ENV</a> handle rather than the DbLock handle.  Applications
calling the DbLock::put or DbLock.put method should update their calls
to use the enclosing <a href="../../api_c/env_class.html">DB_ENV</a> handle's method (easily done as the
first argument to the existing call is the correct handle to use).</p>
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